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2. Antenna amplifier - Wikipedia

   en.wikipedia.org/wiki/Antenna_amplifier

   In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable. An antenna amplifier boosts a radio signal considerably for devices that receive radio ...

3. The 7 Best HDTV Antenna Amplifiers of 2023 For a Better Signal

   www.aol.com/lifestyle/best-high-definition-tv...

   Typically, your cable signal will weaken by 5 dB for 100 feet of cable it passes through. If the signal is weak when it comes out of the antenna, it may become too weak for the TV to decode ...

4. Attenuator (electronics) - Wikipedia

   en.wikipedia.org/wiki/Attenuator_(electronics)

   A 3 dB pad reduces power to one half, 6 dB to one fourth, 10 dB to one tenth, 20 dB to one hundredth, 30 dB to one thousandth and so on. When input and output impedances are the same, voltage attenuation will be the square root of power attenuation, so, for example, a 6 dB attenuator that reduces power to one fourth will reduce the voltage (and ...

5. Low-noise amplifier - Wikipedia

   en.wikipedia.org/wiki/Low-noise_amplifier

   The loss in that feed line is 3.2 dB at 1 GHz; approximately 5 dB at the GPS frequency (1.575 42 GHz). This feed line loss can be avoided by placing an LNA at the antenna, which supplies enough gain to offset the loss. An LNA is a key component at the front-end of a radio receiver circuit to help reduce unwanted noise in particular.

6. Low-noise block downconverter - Wikipedia

   en.wikipedia.org/wiki/Low-noise_block_downconverter

   This is the signal-to-noise ratio at the input divided by the signal-to-noise ratio at the output. It is typically expressed as a decibels (dB) value. The ideal LNB, effectively a perfect amplifier, would have a noise figure of 0 dB and would not add any noise to the signal.

7. Signal-to-noise ratio - Wikipedia

   en.wikipedia.org/wiki/Signal-to-noise_ratio

   The OSNR is the ratio between the signal power and the noise power in a given bandwidth. Most commonly a reference bandwidth of 0.1 nm is used. This bandwidth is independent of the modulation format, the frequency and the receiver. For instance an OSNR of 20 dB/0.1 nm could be given, even the signal of 40 GBit DPSK would not fit in this bandwidth.